Meditation has been shown to aid with the management of affective disorders through improving emotion regulation. Here we begin to develop a theory of meditation by creating a computational cognitive model of focused attention meditation. Our model was created within Prims, a derivative of the ACT-R cognitive architecture. We implemented a model based on an extensive literature review of how the meditation experience unfolds over time. We then tested the Prims model in a sustained attention task, intending to capture a faculty that may be trained with meditation practice. The model was significantly better able to maintain focus after the meditation practice than before. These results agree qualitatively with empirical findings of a longitu...